What do you have the hot hide set at? Perhaps try lowering it a few degrees?

My male BP is almost invariably in the middle hide of the enclosure, so I presume those are the temperatures he prefers most. However, he does use the hot hide occasionally after a meal, or to defecate. I've only seen him use the cool hide once in two months.

My female BP on the other hand was mostly in the cool hide the first few days, and has mostly been in the warm hide since she ate. However, she switches between them enough that whenever I try to check the hide that she won't be under so I can tell without disturbing her, she's often actually there.